دورية أكاديمية
A Hydrochemical Method for Identifying Orbital Imprints of Dust in Paleofluvial Sequences
العنوان: | A Hydrochemical Method for Identifying Orbital Imprints of Dust in Paleofluvial Sequences |
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المؤلفون: | Zhongyi Yan, Yibo Yang, Wenxia Han, Yudong Liu, Xiaoming Liu, Xiaomin Fang |
المصدر: | Geophysical Research Letters, Vol 51, Iss 14, Pp n/a-n/a (2024) |
بيانات النشر: | Wiley, 2024. |
سنة النشر: | 2024 |
المجموعة: | LCC:Geophysics. Cosmic physics |
مصطلحات موضوعية: | Geophysics. Cosmic physics, QC801-809 |
الوصف: | Abstract Mineral dust plays an important role in Earth's climate system, yet it is difficult to identify dust imprints in paleofluvial sediments, especially on orbital timescales. Here, we present high‐resolution authigenic carbonate Ca–Mg–Sr compositions in a fluvial sequence under the transport pathway of Asian dust. The Mg/Ca, Sr/Ca, and Mg/Sr ratios exhibit distinct transitions in both secular trends and orbital cycles at ∼8 Ma. Before ∼8 Ma, given similar Mg and Sr partitioning behaviors during carbonate formation, hydroclimate changes yielded strong orbital signals in the Sr/Ca and Mg/Ca ratios but no detectable signals in the Mg/Sr ratios. After ∼8 Ma, given the strengthened input of Mg‐rich dust during cold‒dry periods, the Mg/Sr and Mg/Ca ratios clearly exhibited orbital signals, but the Sr/Ca ratio did not. Such transitions in carbonate composition corroborate the dust‐induced changes in fluvial hydrochemistry, offering an innovative methodology for detecting orbital dust cycles in paleofluvial systems. |
نوع الوثيقة: | article |
وصف الملف: | electronic resource |
اللغة: | English |
تدمد: | 1944-8007 0094-8276 |
Relation: | https://doaj.org/toc/0094-8276; https://doaj.org/toc/1944-8007 |
DOI: | 10.1029/2024GL109988 |
URL الوصول: | https://doaj.org/article/37852ce9a979454da723246a64f8f23e |
رقم الأكسشن: | edsdoj.37852ce9a979454da723246a64f8f23e |
قاعدة البيانات: | Directory of Open Access Journals |
تدمد: | 19448007 00948276 |
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DOI: | 10.1029/2024GL109988 |